Feed-water heater



Mrch 1927' H. J. STERNBERG FEED WATER HEATER 2 Sheets-Sheet 1 Filed Aug. 12,

. I 1,621,289 March 1927' H. J. STERNBERG FEED WATER HEATER Fil'ed Aug. 12. 1922 2 Sheets-Sheet 25 at the same-time, the arrangement of the Figure? isan end elevation: of a feed r 1 "I-IERMANJ. srnnnnntae,or-saucers, iarssenmi v FEED-WATER HEATEB.T i lfii' i-iqationni a August12,1922. seriarnas n Lisa* f i V T his intention relates to feed water heat-' ventioniwill be'pointed outinithe appended ers. V Oneof the difficultles aris ng in the claims,- a I i use of feed-water heaters is that unless the lnvthe drawingzg- H feed-Water is very pure, scale and sediments V Figure 1 is "2t" S1-1lOStjtI1tl1lly: longitudinal" 5 deposit.in the tubes of theheater and ma-j vertical section through the feed-water q terial-ly interfere with its efficiency. The heater but with some of the tubes broken generalobject of this invention is to overaway .andvshown in section; 5 come this difficulty and provide afeed-Watr ;F-igure Lisa, vertical section; through the heater of simple construction in which the .main, head taken abouedn' the :line 2- i- 2,-o f 10 tubes are mounted in such a way as to en-- Figure 1;, v a 1 I A 1 able the entire bank or set of tubes to be Figure-3 isa' verticalsection through the removed bodily vfrom the purifier, when def main head taken about? at the line3-3 of sired, in order to make repairs. I am aware Figure 1; L 1v I that rotary cleaners have been usedin tubes Figure 4c is across-section taken about onof feed-water heaters to prevent the" deposit the line t l-of Figure 1;

' or formation of scale, but with the usual Figure 5 is aside elevation of the tube arrangements for driving these cleaners, the nest orbankrepresenting the same' as in driving pinions of all the cleanersmust re-the act of. being slid into the aenclofthe main in place. One ofthe objects of my shell, aportion'ofthe latter being-shown in' invention is to provide an improved arrangevertical section; 1 4 j l a I ment of the tubes which will facilitate driv- Figure 6 is a section taken about; on the g5; ing the cleaners or scrapers lying within line 66 of Figure 5 and illustrating" the v them, and which will also facilitate the connection between the tube sheet, and a plugging of any tube which becomes leaky; tube;

driving pinions is such as to enable the leaky water heater and illustrating the means Y tube and its cleaner to be thrown out of which I provideufor I driving the cleaners j use without interfering with the effective from a fee'd-water pump; 7 driving of the cleaners in the remainingyyF-igure 8 ;is,-a diagrammatic view illus-' tubes: By reason of the presence of these trating the arrangement ofgdriving pinions scrapers, the formation of, deposit or scale which enables all of thecleaners in effective is prevented and the heater can operate contubes to be driven although many, of the tinuously fora great length of time without tubes maybe leaky andrnot in use; beingoverhauled or repaired, A further Figure 59 is a horizontalsectiontaken '35 object of the invention provides simple through the main headandillustrating the 45 ging of the tube.

means for e'fiecting the continuous driving manner in whicha defective tube may-be 0f the cleaners, and in suh a waythat the plugged. V V I n movement'of the cleaners varies automatt. Referring more particularly to Ktheaparts, really orproportionallywith the amount offl'represents the shell of the heaterwhich feed-Water being used. Another object of may consist of a body section *2 anda ring 5 I the invention is to provide a construction section 3 bolted together at flanges lrfThe "x-i which will facilitate the removal, of any tubes through which i h feed-'vvatercircu' V cleaner in case the tube surrounding it has 'lates comprise an vouter "set o'f tubes 5 and become leaky, thereby facilitating the plug' an inner'set of tubes 6 whichare disposed circumferentially around the axis ofa-th'e Further ob 'ects of theinvention lwillfapr. shell. These tubes-are all connected together pear hereinafter. v

I The. invention consists in the novel fea} comprising an inner tubesheeti S" andan tures', and in the general combination of outer tube sheet'9, the former of which is parts to be particularly described hereinof smaller diameter than the bore of the 1 after, all of which contribute to produce a shell, so as-to enable the entire tube nest i simple and efficient vfeed-Water heateiz: A to be slid longitudinally into place. V preferredembodiment of my invention will The inner tube slieetz 8 comes againsta' beiparticularly described in the following seat or counterbore;1O which is aformed on so as to'forin atube nest 7 (seeFigure 5),

speoification'while'the broad scope of my inthe inner'face of a: main head 11 (see Figure 9 I 1). The outer tube sheet tween the flanges 12 and 13 9 is clamped beof the shell ring 3 and a secondary head 14. These heads 11 ondary head 14 being merely to maintain :the tubes, that is to which are remote waterin this way, vi'ded. with a wall 7 sofnedistance from the tube sheet 8, and

and 14' are constructed so as to co-operate to effect a circulation of the feed-water through the tubes, the function of the secthe space betweenqthe tube sheet and the vvall"15 is divided by a transverse Web 16 into an inlet chamber. 17 and an outlet chamber 18, one 'of saidchambers having an inletport 17 and the other two outlet ports 18' to'which pipe connections can be attachedfor leading the feed-water in and out of the heater.

" I provide a plurality of cleaners'which correspond respectively to'the different diameter I sired, any

responding scraper 19.

head is provided witha leaky, it will not tubes, and each cleaner has a twisted scraper 19 Which lies inthe tube. head 1 1, are mounted a plurality of driv- 1 ingishafts 20, each having a driving pinion .21, and these driving shafts sets concentric with the different are arranged tubes, and are arranged likethe tubes circumferentially'around'the axis of'the shell as a center. Each shaft 20 connects with its cor- Each shaft 20 is mounted rotatably in a bearing opening 22 in=the wall 15 of the main head, and these bearing openings are slightly larger than the ofjthe scrapers 19 so that if depinion may here-moved and its shaft and corresponding scraper 19 pulled out of the heater.

In order to facilit ate this operation, the cover plate or guard 23 which if desired,may form an outerbearingfor the shafts 2 The inner set of pinions all mesh with a gear 24 and the inner setof pinions also mesh With the outer set of pin ions, so that when the center gear 24 is driven, all of the pinions 21 unison, that is tosay, the inner set of pinwill rotate in ions will transmitthe-rotary motion to the outer set; ,There may be as many of the inner and outer tubes as desired, and which 'can be conveniently placed around in the rior of the shell. With this arrangement of driving pinions' and tubes, it will be'evi'dent that if any tube should become be necessary to make a re pair at once. In order to effect a temporary repainit is simply. necessary toremove thecover plate 23 and the pinion and shaft 7 of the leaky tube and then, to drive a plug 25throu-gh the bearingopening in the wall 15 and-into the mouth of a leaky'tube, such baffle plate'29 is On the main I where it arrives at the :fromthis point, it flows back lower half of the tubes and enable the cleaners of all the re1naining outer tubes to be continuously driven. In order to pass hot gases or steam. through the heater, the ring section 3 is provided with an inlet opening 2 7 and an outlet opening 28 (see Figure 4); Although these openings'are opposite to eachother, a

provided which extends diametrically across the shell in a nearly ver-. 'ticalposition'. [One endof this baffle plate is disposed against the tube sheet 9, while the other end terminates short of the tube sheet 8, so that the steam will have to pass toward the head 8 andturn the edge of the bafiie before it connection.

In order to drive the cleaners continu ously, I provide simple means for rotating the center gear 24. This may consist of a ratchet and pawl device 30 carried on an arm 31 which is connected by a link 32. to an arm 33 carried on arocker which is actuated from across-head 34: of a feed pump 35, indicated in dotted lines in Figure 7.

In the operation of the feed-water heater, "the feed-water may enter at the inlet 17 and pass through the tubes above the Web 16 to the outer end of the feed-water heater, secondary head 14 through the finds outlet through theoutlet ducts or necks 18.

The steam-which heats the water-passes to and fro on each side of the baffle plate '29, as described above. I.

If desired, the walls of the shell 1 may be provided with a non-conducting or asbestos packing 36. V I 1 It is understood that theembodiment of the invention described herein is only one-of the many embodiments my invention may take, and I do not wish to be limited in the practice of my invention nor in my claims,

What I claim is: 1. In a fecd water heater, the combination of a cylindricalshell, a' pair of tube sheets, a l'ilurality of tubes connecting said tube sheets and co-operating tllGIGWitl'lltO constitute a tube nest, one of said tube sheet-s being of smaller diameter than the :shell so to the particular embodiment set forth.

as to permit the tube nest to he slid 'longiof the remaining effective tubes.

can flow back to the' outlet I lUU headsz; haying meansgtor circulating feed water. through thetubes and receivingand supporting the smaller of said? tube: sheets, and meansfor circulating a heating medium .througlrthe shell and around thetubes;

In a'- feed-water heater,-'the combination of a cylindrical. shell; a pair of tulive sheets, a: plurality of tubes connectingsaid tubesheets and co op-erating therewith to constlute a tube" nest, one of said tube the other chamber to enable feed water to be circulated through said tubes, secondary head secured to the other end of the shell and maintaining coii'iinriiiica tion between the tubes at that end of the shell, and means for circulating a heating medium through the shell and around the tubes. 7

3. In a feed-water heater, the combina tion of a cylindrical shell, a pair of tube sheets, a plurality of tubes connecting said tube sheets and co-operating therewith to constitute a tube nest, one of said tube sheets being of smaller diameter than the shell so as to permit the tube nest to he slid longitudinally into the shell. a main head removably attached to the shell with a seat receiving the smaller tube sheet and having chambers for effecting the circulation of the feed Water through the tubes, a secondary head at the other end of the shell for maintaining communication of the tubes with each other,

. a plurality of rotary cleaners having driving shafts rotatably mounted in the main head and having bodies lying within the tubes for scraping the walls thereof, said niain head having a chamber on its outer side, a plurality of pinions carriedby said shafts, and a driving gear meshing with the pinions for driving the same, all of said gearing being located in said chamber, said 7 main head including a guard covering said gear and pinions, means for rotating said gear, and means for circulating a heating medium through the shell and around the tub-es.

l. Ina feed-water heater, the combination of a cylindrical shell, a pair of tube sheets,-a plurality of tubesconnecting said tube sheets and co-operating therewith to constitute a tube nest, one ot'saidtube sheets being of smaller diameter than ,the shell so,

as to permitthe tubenest to he slid longitudinally into the shell, a main head remov ably attached to the shellwith a seat receivmg the smallertube sheet, and having a Wall spaced from the sheet, said wall having a transverse Web seatingagainst the smaller tube sheet and dividing the space between the head and sheetinto two: chambers communciating with the" interior of the tubes,

said head having an inlet opening communicating W117i) one of said chambers and an outlet opening communicatingwith the other chamber to enabl-eufeed water to be circulated through said tubes, a secondary head secured to the vother end of the shell and '1naintainingv communication between the tubes at that end of the shell, a baffle plate extending transversely across the interior of the shell with one end disposed against the. larger -tube sheet, said baiiie' plate being shorter than the interior oi the shell, said shell having an inlet openinga'ndxan outlet opening at the end thereof-adjacent the secondary head and co-operating with the said bafiie' plate to circulate steam to and fro throughthe shell and around the said tuhes.- l I y 5. In a feed-Water heatelgthe combination of a cylindrical shell, a "pair o-ftube sheets,-,

a plurality "of tubesconnecting said tube sheets, disposed lll circumferential; rows around the axis of the shell and co-operating with the tube sheets to constitute a tube nest removable from-the shell, "a mainhead removably attached to the casing having a seat 2 receivmg one of sand tube sheets and being divided into chambers foreliecting the circulation of the feed water through the, tubes, secondary head at the other end of the shell for maintaining communication of the tubes with each other, said main head having a chamber on its outer side, a plurality of 110- tary cleaners having driving shaftsrotatably mounted in the main head and having bodies lying within the tubes for scraping the walls thereof, an outer set of pinions carried by said shafts and disposed circumterentially about the axis of the shell to correspond with the arrangement of said tubes, 'a' driving gear, a' second set of pinions arranged cir cumferentially about the driving gear and mesh ng with the other pinionsto ,drlvethe same, means for rotating said gear, and

through the shell and around the tubes.

6. In a teed-water heater, the combination of a cylindrical shell, a pair of tube sheets within the shell, a plurality of tubes connect ing saidtube sheets, a main head ren'iovably attached to the casing having a "seat receiving the adjacent tube sheet and having ducts i'or eltecting circulation of the. feed Water through the tubes, a secondary head at the otherend of the shell for maintaining cornmunication of the tubes with each other, a

plurality of rotary cleaners having driving 1111821115 for circulating a heating medium 's hafts-r otatably mounted in beaiingopenings in the main head, and having scrapers lyingwithin the tubes for scraping the Walls thereof, the said scrapers being of small enough diameter to enable any driving shaft and its scraper to be pulled outwardly from its corresponding tube to enable the tube and thebearing opening in the main head corresponding to the shaft, to be plugged, pinions carried by said shafts, means for driving said pinions to rotate the cleaners, and means for circulating a heating medium throug li'the shell and around the tubes.

7. In a teedwater heater, the combination of a cylindrical shell, a plurality o1" tubes disposed circnmferentially about the axis of the shell, a main head and a secondaryhead secured to the ends of the shell and co-operating to effect circulation of the feed Water through the tubes, a plurality of cleaners having shafts rotatably mounted in the main head and having scrapers received in the "tubes, said, shafts being circumferentlally disposed about the axis oi": the shell as a center and registering With the said tubes, pinions carried respectively by the shafts, a center gear,p1n1ons connecting the center gear With the first named pinions to enable the center gear to drive the pinions, means for rotating the center gear, and means for circulatingsteam through theshell and around the tubes. r

8. Ina teed-Water heater, the combination of a cylindrical shell, an outer set of tubes disposed circumferentially about the axis of the shelhan inner setof tubes disposed circumferentially about the axis of the shell, a main head and a secondary head'secured to the ends of the shell and co-operating to effect circulation of the feed Water through the tubes, and a plurality oi cleaners having shafts rotatably mounted in the main head and having scrapers received in theitubes, said shafts being circumferentially' disposed about the axis of the shell as a centera-n'd registering pinions and an inner set of pinions corre sponding to the sets of tubes, carried by the sh afts, the pinions corresponding to the in" ner set of tubes meshing with the pinions corresponding to the outer set oftubes, a center gear meshing With the inner set of pinions for driving the same, means for rotating the center gear, and means for cir culating steam through the shell and around the tubes. t

In testimony whereof, I have hereunto set my hand.

HERMAN J. STERNBERG.

Mi said tubes, an outer set oi 

